Technology, Performance, and Selection Guide for Modern Manufacturers

All pod machines follow the same fundamental workflow: Film Unwinding → Conditioning → Molding → Filling → Sealing → Cutting → Inspection → Packaging. Below is a detailed breakdown of each component and its function.

Film Unwinding & Conditioning System
Function: Deliver flat, wrinkle-free PVA film to the molding station while maintaining optimal moisture and temperature.
Key features:
Automatic reel splicer: Connects new film rolls without stopping production (critical for high-speed lines).
Tension control: Servo-driven rollers to keep film taut but not stretched (prevents thinning/cracking).
Environmental chamber: Maintains 25±2°C and 40–45% RH—PVA film is flexible and non-brittle under these conditions.
Film compatibility: Supports 30–90μm thick PVA films, including cold-water soluble (5°C), standard (20°C), and hot-water soluble (50°C) grades.

Molding Station (The "Heart" of Pod Shape)
Function: Form flat PVA film into pod-shaped cavities using vacuum or pressure.
Key features:
CNC-machined molds: Precision-engineered cavities with smooth surfaces (prevent film tearing); available in 1–5 chamber designs.
Vacuum forming: Negative pressure (0.06–0.08 MPa) pulls film into molds—creates consistent cavity depth and shape.
Quick-release design: Molds can be swapped in 15–20 minutes for different sizes/shapes.
Pod size range: 5–30g (laundry: 8–20g; dishwashing: 15–30g; personal care: 5–10g).

The filling system determines pod performance and shelf life. It must handle liquids, powders, gels, or granules with high accuracy.

Liquid Filling
Technology: Plunger-type metering pumps (most common) or peristaltic pumps.
Accuracy: ±0.02mL (plunger pumps) → ensures consistent dosage per pod.
Viscosity range: 10–10,000 mPa·s (handles thin surfactants to thick fabric softeners).
Anti-drip: Nozzles with automatic shutoff to prevent leakage between fills.

Powder Filling
Technology: Cup-type feeders (volumetric) or screw feeders (gravimetric).
Accuracy: ±0.5% (gravimetric) → critical for bleach/enzyme blends.
Anti-caking: Agitators in hoppers + dust extraction systems to keep powder flowable.

Multi-Chamber Filling
Independent channels: Separate pumps/feeders for each cavity → different formulas per pod.
Synchronized filling: All channels start/stop simultaneously → balanced pod weight.

Heat Sealing & Cutting System
Function: Seal the top PVA film to the molded bottom film, then cut individual pods.
Key features:
Patented water-sealing technology: Heated plates (120–150°C) with precise pressure (3–5 bar) → strong seal (≥200g/cm²) without overheating PVA (preserves solubility).
Dual-layer sealing: First seal the cavity edges, then seal the outer perimeter → double protection against leakage.
Rotary cutting: Servo-driven blades cut sealed pods cleanly → no ragged edges or film waste.

Key features:
Vision system: Cameras check for misalignment, underfilling, weak seals, or discoloration.
Weight checker: Weighs each pod → rejects units outside ±1% of target weight.
Automatic rejection: Pneumatic ejectors remove defective pods without stopping the line.

Manufacturers can choose between two primary equipment categories, based on production scale, budget, and customization needs.

Economic Model (Small-to-Medium Batch Production)
Target users: Startups, OEMs, or brands with low-to-moderate volume (60–180 pods/min).
Automation level: Semi-automatic (manual film loading, finished pod collection).
Key features:
Basic PLC control with manual parameter adjustment.
Single/dual filling channels (liquid + powder).
Standard molds (1–5 chambers, 10–25g).
Lower initial investment (30–50% less than high-speed models).
Best for: Standard laundry/dishwasher pods, small-batch custom orders, or test market production.

High-Speed Model (Mass Production)
Target users: Large FMCG brands, contract manufacturers, or high-volume producers (60–180 pods/min).
Automation level: Fully automatic (IoT-integrated, remote monitoring, predictive maintenance).
Key features:
Advanced servo synchronization + AI-driven process control.
Multi-chamber filling (up to 5 chambers) + formula storage for 20+ products.
Quick-change molds + automatic cleaning systems.
Dust-free, anti-drip design → material waste

Speed： 60-180pcs Pods per min

Filling： Liquid/Powder ±0.01

Chamber： 1-6 Chambers

Weight： 5-25g

Changeover： Mold 20-30min

Footprint： ( L*W*H ) 1.1*0.8*1.61m

Water-soluble pod machines are highly adaptable—customize for these key applications:

Laundry Pods
Customization: 1–5 chambers, liquid-dominant formulations, cold-water soluble film.
Optional: Fabric softener injection, fragrance dosing, or colorant mixing for multi-color pods.

Dishwasher Pods
Customization: 3–4 chambers, powder-liquid-gel combinations, hot-water soluble film.
Optional: Enzyme granule feeders, anti-spot gel dispensers, or salt tablet insertion.

Personal Care Pods (Shower Gels, Bath Salts)
Customization: 1–4 chambers, gel/paste formulations, skin-safe PVA film.
Optional: Essential oil dosing, glitter addition, or moisturizer blending.

Maintenance & Operational Best Practices
To maximize equipment lifespan and minimize downtime:
Daily: Clean filling nozzles/molds; check film tension and seal quality.
Weekly: Lubricate servo motors; inspect vision system cameras; test emergency stops.
Monthly: Calibrate filling pumps; replace worn sealing gaskets; update IoT firmware.
Annual: Full machine inspection; replace aging components (rollers, blades); optimize production recipes.
Critical note: PVA film is hygroscopic—store in sealed, climate-controlled areas (20–25°C, 40–50% RH) to prevent moisture absorption or drying out.